/Engine/Source/Runtime/Json/Public/Dom/JsonObject.h
Set an ObjectField named FieldName and value of JsonObject
void SetObjectField ( const [FString](API\Runtime\Core\Containers\FString) & FieldName, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FJsonObject](API\Runtime\Json\Dom\FJsonObject) > & JsonObject )